Big Idea
Negative numbers help us to model many real world situations.
Essential Question: How do I multiply and divide integers?
Haris Shaiful Bahari
May 5th 2009
Block C
Breaking Even 5.2
A.) Make a table that shows the profit Jean will earn for 0 through 20 tune ups.
T= Tune ups
Numbers are in dollars
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10
T11
T12
T13
T14
T15
T16
T17
T18
T19
T20
60
120
180
240
300
360
420
480
540
600
660
720
780
840
900
960
1020
1080
1140
1200
B.) Plot the data from your table on a coordinate grid. Be sure to label the axes. Explain how you chose the scale for each axis. I chose the scale for Tune ups by just making it in the original order because it is not as big as 1200. The Axis for Profit is made into intervals of 50 so that I could save some space and squeeze in 1200 in. C.) What will Jean’s profit be if she does only four Tune ups. How is this shown on the graph?
If she does 4 Tune Ups she would ear $240 which means her profit is -$560. On the graph is showing a straight diagonal line from 0-240.
D.) How many tune ups will Jean have to do before she breaks even? How is this shown on your graph? She would have to do 14 tune ups which will get her $840 with $40 as her first profit. On the graph it shows a straight diagonal line from 0-840.
E.) How does Jean’s profit change with each tune up she does? How is this shown on the graph? Her Profit just goes up $60 for each tune up. On the graph it is just a continuation of the straight diagonal line.
Follow Up:
1.) Jean figure out that she could decrease her start up cost to $600 by buying used tools. She writes a new equation, P=60t-600, to determine her profit. What is the break even point for this profit equation? The Break even point is 10 tune ups so that she gets $600. 10t=$600.
2.) Jean’s friend Chuck thinks Jean should advertise her business in the local paper. This would increase her costs, giving her the profit equation, P=60t-1200. What is the break even point for this profit equation? The break even point would be 20 tune ups to get $1200. 20t-$1200.
Negative numbers help us to model many real world situations.
Essential Question: How do I multiply and divide integers?
Haris Shaiful Bahari
May 5th 2009
Block C
Breaking Even 5.2
A.) Make a table that shows the profit Jean will earn for 0 through 20 tune ups.
T= Tune ups
Numbers are in dollars
B.) Plot the data from your table on a coordinate grid. Be sure to label the axes. Explain how you chos
I chose the scale for Tune ups by just making it in the original order because it is not as big as 1200. The Axis for Profit is made into intervals of 50 so that I could save some space and squeeze in 1200 in.
C.) What will Jean’s profit be if she does only four Tune ups. How is this shown on the graph?
If she does 4 Tune Ups she would ear $240 which means her profit is -$560. On the graph is showing a straight diagonal line from 0-240.
D.) How many tune ups will Jean have to do before she breaks even? How is this shown on your graph?
She would have to do 14 tune ups which will get her $840 with $40 as her first profit. On the graph it shows a straight diagonal line from 0-840.
E.) How does Jean’s profit change with each tune up she does? How is this shown on the graph?
Her Profit just goes up $60 for each tune up. On the graph it is just a continuation of the straight diagonal line.
Follow Up:
1.) Jean figure out that she could decrease her start up cost to $600 by buying used tools. She writes a new equation, P=60t-600, to determine her profit. What is the break even point for this profit equation?
The Break even point is 10 tune ups so that she gets $600. 10t=$600.
2.) Jean’s friend Chuck thinks Jean should advertise her business in the local paper. This would increase her costs, giving her the profit equation, P=60t-1200. What is the break even point for this profit equation?
The break even point would be 20 tune ups to get $1200. 20t-$1200.